Stoneworking-machine.



G. H. GILMAN.

STONEWORKING MACHINE. APPLICATION FILED JULY 21.1908.

Patented Deo. 14, 1915.

2 SHEETS-SHEET l.

G. H. GILMAN.

STONEWORKING MACHINE.

APPucATmN FILED JULY 21.1908.

1,164,083. Patented Dec. 14, 1915.

2 SHEETS-SHEET 2.

Treatise.

Tap sTaTEsf' gTQaTENT @Tirion GEORGEE. Gini/IAN, or cLAEEivioNfr, NEWnniarsnInE, assieNon, EY iviEsNE iissIGN- MENTS, To suLLiyAN iviaeriiNEECOMPANY, or Eos'roii, i/iassacniisnmrs, A

CORPORATION F MASSACHUSETTS.

STONEWOBKNG-MACHINE.

To all whom it magy concern:

`Be it knownthat I, 4GEORGE H.y GILMAN, aV

fcitizen of the yUnited States, .residing at Claremont, in the county ofSullivan, State of New Hampshire, have` invented an Im- --provement inStoneworkingiachines, of

which the following description, in connection with the accompanyingdrawings, is a speciication, like Yletters on the drawings representinglike parts.

Y. This invention relates tostone working macliines, the embodimentherein shown being intended more particularly foi' the dressingor'su'rfacing of stone.'` p Y The invention will be best understood byvreference to the following description when f taken in `connection withthe accompanying illustration of one specilicembodiment f thereof, whileits scope .will4 be more particularly pointed out in the appended claim.

vIn the drawings: Figure 1 is a side eleva- Vtion of a surfacing machineembodying one form of my invention g'FigfQ is a horizontal 3 3 in Fig.1; Fig. lis a side elevation of,

section in plan on the line 2 2 of Fig. 1, theV larger portion ofthemachine being broken away. Fig. 3 is a similar section on the linethecap` at the top of the central column at and tools; and Fig. 6 isa-vertical section right angles tothe view shown in Fig. 1; Fig. 5 is anend elevation of thetoolcarrier taken on the line 6 6 of Fig. l andlooking toward the left of said view. Y Y

Referring to the drawings and to theipaiticular embodiment of myinvention there` Y shown, the machine is mounted upon any vsuitablesupport, the latter herein `comprising a portable base or truck 1,mounted upon v wheels 2, upon which the apparatus may move along thetrack 3.

ln the form herein illustrated, the baseis piovidedwvith an uprightcentral support, herein a column Li'i'iredly secured upon the mainsupporting carriage 5, which is free to beadjusted vertically and to-bemoved rotatably with respect to said column at the will oftheoperatorand in a mannermore I `fully hereinafter described. i

. tending tool-carrying member, herein in the The carriage supports thelaterally eX- form ofy a radial arm 6, near theouter end of which issupported the main surfacing or dressingtool 7, Y In the present machinethe Specification of Letters Patent. Fhren-@Qd Dec, 14, 1915 Applicationled July 21, 1968. Serial No. 444,621.

construction of the parts are such that the radial arm may be raisedorlowered toadjust the vertical position of the arm and tool, or itseifective length may be increased or diminished relatively to thestandard while, at the same time, the tool may be swung vabout thesupporting standard in the arc of a circle, as requirements of the workmay n demand.

Although the swinging adjustment of the" i portions S which embrace thecolumn l with -suiiicient clearanceso that the carriage may Y `turnfreely about the same or move freely up and down, but sufficiently closetomaintain the arm 6 substantially firm and rigid.

The radial supporting arm Vherein vconsists (Figs, 3 and-6) of aframe-work composed of two parallel spaced members 9,

herein iii the form of channel irons, embracing the column-1 `and heldin their spaced relation at each end Aby suitable spacing blocks, one ofwhich 10 is shown at the outer or working end of the arm16.VK

n order to permit the operator freely to move the arniin a radialdirection during the operation of the machine, each channel iron isconfined between pairs of upper and lower flanged4 guiding rollers 11,the latter Vengaging bothabove and below on vertically. opposite sidesof the channel irons. The distance between the rollers is such that,while the arm is fixedly and rigidlyV held in the desired horizontal4position upon the carriage, it may be slid radially or longitudinallywith reference to the supporting v column at will upon the rollerbearing supports thus aorded.

To permit the operator to adjust the armv and tool vertically there isattached to the carriage 5, as to the bracket 12 fast thereon, aflexible member such-as the wire cable 13, the latter passing up oversheaves 14 at the top ofthe column and thence downward to a winding drum15 mountedon the cali'- i'iage. The winding drum 15 is mounted inbearings formed inthe brackets 16 and may be turnedby a handle 17 towind or unwind Y the cable the-drum and raise or lowertlieV arm. To thisend the handle 17 is attached` htothe end of ashaft 18, said shaftcarrying '23, the `latter i'evolubly and 'preferably a pinion 'ISmeshingwith" a gear 20, the latter mounted on the end drum shaft. To theopposite end of the drum shaft is keyeda ratchet wheel 21 adapted tobe'engaged by theweig-hted pawl 22and thereby held in any desiredposition.

At the top of the column the guiding sheaves 1li are j ournaled upon acrown piece 'mounted 4upon Vball bearings. The crown piece is,therei'ore, free to turn and adjust 'itself about the axis of the columnin iespense to the swinging adjustment of the `v radial supporting armand such swinging `adjustment may be eii'ected by the operatorby'merelyvpulling the arm toward him or pushing the same away from him.The *crown piece 23 is preferably provided with aneye 24 pivotallysecured to the top of the AVsaine, so that the entire machine may be l,lifted about from one point to another by Vsuitable hoisting mechanism.

allel with the sheaves 14 ispre'ferably provided the sheave 25 journaledupon a stud secured to the crown piece, which sheave is deeply groovedso as to be capable of guiding and'receiving the hose 26 used to convey"3 ,the pressure fluid to the working tool.

t :In the illustrated forni of inachinel have provided a plurality(herein two) 'of cutting Yunits each comprising a cutting tool or set oftools 27 and separate tool-actuating '3 units 28,'the latter hereinconsisting of pres# sure fluid-actuated 'pereussive tools of the reieiprocating hammer type,each with its piston .hammer adapted to delivera series of blows to the bit or support carrying the associated cuttingtool or tools. Preferably these tools uare constructed so as to operateindepend- A' the same instant.

, ently sov that they will not necessarily work simultaneously in thesame direction. This 4may be accomplished in other ways, but by 'simplymaking the two tools distinct and' independent of each other, Vowing toordis l'nary differences such as care in manufac-y ture, it would beonly by the merestchance that-both pistons would strike at precisely Bythis means, the vibral tion set up'by one piston would be, to averylarge extent, offset or neutralized by that of j vibration at the end ofthe arm .to a minimum. vln the present case these cutting fv units aremounted upon the armrso as to .haveA a longitudinally fixed or non-trcveling relation thereto during the active operation of the machine.While to'thisend they might be mounted upon a carrier adjustable todifferent fixed positions along the arm',

, in the present oase l have provided'a tool support permanently fixedon the arm, and,

*At the'side of the crown piece and par- .the other, thereby reducingthe shock and for this purpose, malteusethegspacingl l block 1,0V in theouter endfof the arm. 4 This .block V10 acts'as a tool support and isnar-V rowed at its outer end andcontallsVY a vertical perforation.` Tothis is secured al toolcarryingbody29 by means of horizontal Vears 30which are hinged to the block by meansof a bolt 31 passing throughtheperforatio-n on the saidblo'cl and alined perforations inlth'ersaidears. Y This pivotal or hinged adjustment of the tool carrier29 to the tool support lOp'rovides meansjfor ad-v justably swinging thetool f7 an'd Vniaintainf ing the resultantlinesfo cut of thel differentsets oftools in alinemeiit, irrespective of the varying swingingadjustmentof the arm, which,without some means of ladjustingsimultaneously andtogethereither the too-l carrier or the cuttingtoolsthemselves would produce a variation in the resultant lines of cut.

ln the employmentof this apparatus theY operator, having vertically Yadjusted theV `main supporting carriage and the arm, can

start both sets of tools in operation by ad-V mitting pressureiiuid tothe-two piston hamj mer tools through the throttle valve 32.

With the kmachine Ain operation he can4 swing j Ythe arm withftheattaehedtools about the central support or move' the armi longitudinallyupon its supporting carriage, there bef" ing vpreferably provided' forthis purpose a grasping member onlthe ai-nite be grasped by theoperator, such grasping member herein comprisingY acurvedl handle l33vbolted to Vopposite sides ofthe end of the arm 6 andi having its curvedVportion rencircling the tools. As the arm is swung about the sup portduring thev operation of the tool it be comes necessary to turn thetoo'lsA together `about their pivotal support, and, for this purpose,there is also provided yiinmediately below the handle 33 a secondgrasping handle, the latter (Fig-12) secured tothe cylinder casting ofthe hammer tools, Vsofthat with one hand "upon the handle '33 to swingthe` fizo vertical independentv turning movementA preferably, as shown,`they 4are mounted in the same casing andv upon'V the same support 29 infixed relation toeach other so as Vto turn together turned.

while i have herein' Shown-.ana dageraad one formfo'f my invention forpurposes of illustration, it will-be understood that the invention isnot limitedeither to the particuwhenthe tool-carrier 29 is larapplication thereof herein made, or to Vthe construction and detailsshown, but that various modifications can be made therein Withoutdeparting from the spirit and scope of my invention.

I claim: In a stone surfacing machine, an upright central support,a'laterally extending arm radially and vertically movable on saidsupport, tool-carrying means pvoted vertically at an end of said arm, aplurality of independently operated, percussve, cutting tools mounted insaid means, and superposed handles on said arm and said means forcontrolling their respective movements.

In testimony whereof, I have signed my name to this specification, inthe presence of tWo subscribing Witnesses.

GEORGE I-I. GILMAN.

Witnesses: I

E. J. BURGHARD, J. A. BRUCE.

iopies of this partent may be obtained forve cents each, by addressingthe Commissioner of Patents,

` Washington, D. C.

